x=0 and stops?

Had my Smartrap for a year, been printing away quite happily, no problems no fuss.
Today I printed one part, removed it from the bed.
Set it to print the same part again, and the head goes through the self-levelling as normal, then moves to centre, as if to start printing, but then moves to x=0?
I am not getting any messages on the lcd, I have no loose wires, it has simply started doing this, and despite repeated attempts, power off, restart etc, I cannot get the printer to function again.
It's not the Gcode, I have tried other files that previously printed ok with the same result.

Here is a quick video to show what it is doing, if anyone can tell me what the problem could be I would be very grateful, I am stumped.

Smartrap problem

Cheers

Rob

I still have no idea what the problem was, but I pulled every plug on the boards, rerouted the cables while I was doing it, plugged it all back in again...and the problem has gone. No idea why one contact somewhere should suddenly decide it isn't going to play nicely anymore, but it obviously did.

Phew....